cookie-s https://blog.hatena.ne.jp/cookie-s/ cookies.txt　　　　　　.scr https://cookies.hatenablog.jp/ なかなか好きな問題でした。 問題 #!/usr/bin/env python3 import os, random from Crypto.Cipher import AES aes = AES.new(os.urandom(16), AES.MODE_ECB) enc = lambda x: aes.encrypt(x.to_bytes(16, 'big')).hex() dec = lambda y: int.from_bytes(aes.decrypt(bytes.fromhex(y)), 'big') p = 0xfffffed83c17 # |G| = p mul = lambda … 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcookies.hatenablog.jp%2Fentry%2F2018%2F12%2F09%2F212052" title="hxpctf2018 writeup blind - cookies.txt　　　　　　.scr" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> https://chart.apis.google.com/chart?cht=tx&chl=2%20%5Clg%20n Hatena Blog https://hatena.blog 2018-12-09 21:20:52 rich https://cookies.hatenablog.jp/entry/2018/12/09/212052 1.0 100%